有没有办法将一些额外的数据传递给系列对象，用于在图表'工具提示'中显示？
例如
tooltip: {
formatter: function() {
return '<b>'+ this.series.name +'</b><br/>'+
Highcharts.dateFormat('%b %e', this.x) +': '+ this.y;
}
这里我们只能使用series.name，this.x＆amp; this.y到系列。假设我需要单独传递另一个动态值与数据集，并可以通过系列对象访问。这可能吗？
提前谢谢大家。
答案 0 :(得分：206)
是的，如果您设置如下所示的系列对象，其中每个数据点都是一个哈希值，那么您可以传递额外的值：
new Highcharts.Chart( {
...,
series: [ {
name: 'Foo',
data: [
{
y : 3,
myData : 'firstPoint'
},
{
y : 7,
myData : 'secondPoint'
},
{
y : 1,
myData : 'thirdPoint'
}
]
} ]
} );
在工具提示中，您可以通过传入的对象的“point”属性访问它：
tooltip: {
formatter: function() {
return 'Extra data: <b>' + this.point.myData + '</b>';
}
}
答案 1 :(得分：14)
此外，使用此解决方案，您甚至可以根据需要添加多个数据：
tooltip: {
formatter: function () {
return 'Extra data: <b>' + this.point.myData + '</b><br> Another Data: <b>' + this.point.myOtherData + '</b>';
}
},
series: [{
name: 'Foo',
data: [{
y: 3,
myData: 'firstPoint',
myOtherData: 'Other first data'
}, {
y: 7,
myData: 'secondPoint',
myOtherData: 'Other second data'
}, {
y: 1,
myData: 'thirdPoint',
myOtherData: 'Other third data'
}]
}]
谢谢你。
答案 2 :(得分：13)
对于时间序列数据，特别是有足够数据点来激活turbo threshold时，上述建议的解决方案将无效。在turbo阈值的情况下，这是因为Highcarts期望数据点是如下数组：
series: [{
name: 'Numbers over the course of time',
data: [
[1515059819853, 1],
[1515059838069, 2],
[1515059838080, 3],
// you get the idea
]
}]
为了不失去turbo阈值的好处（这在处理大量数据点时很重要），我将数据存储在图表之外，并在工具提示formatter函数中查找数据点。这是一个例子：
const chartData = [
{ timestamp: 1515059819853, value: 1, somethingElse: 'foo'},
{ timestamp: 1515059838069, value: 2, somethingElse: 'bar'},
{ timestamp: 1515059838080, value: 3, somethingElse: 'baz'},
// you get the idea
]
const Chart = Highcharts.stockChart(myChart, {
// ...options
tooltip: {
formatter () {
// this.point.x is the timestamp in my original chartData array
const pointData = chartData.find(row => row.timestamp === this.point.x)
console.log(pointData.somethingElse)
}
},
series: [{
name: 'Numbers over the course of time',
// restructure the data as an array as Highcharts expects it
// array index 0 is the x value, index 1 is the y value in the chart
data: chartData.map(row => [row.timestamp, row.value])
}]
})
此方法适用于所有图表类型。
答案 3 :(得分：3)
我正在使用AJAX从SQL Server获取数据，然后我准备了一个js数组，用作我图表中的数据。 AJAX成功后的JavaScript代码：
...,
success: function (data) {
var fseries = [];
var series = [];
for (var arr in data) {
for (var i in data[arr]['data'] ){
var d = data[arr]['data'][i];
//if (i < 5) alert("d.method = " + d.method);
var serie = {x:Date.parse(d.Value), y:d.Item, method:d.method };
series.push(serie);
}
fseries.push({name: data[arr]['name'], data: series, location: data[arr]['location']});
series = [];
};
DrawChart(fseries);
},
现在在工具提示中显示额外的元数据：
...
tooltip: {
xDateFormat: '%m/%d/%y',
headerFormat: '<b>{series.name}</b><br>',
pointFormat: 'Method: {point.method}<br>Date: {point.x:%m/%d/%y } <br>Reading: {point.y:,.2f}',
shared: false,
},
我使用DataRow迭代我的结果集，然后我使用一个类在以Json格式传回之前分配值。以下是Ajax调用的控制器操作中的C＃代码。
public JsonResult ChartData(string dataSource, string locationType, string[] locations, string[] methods, string fromDate, string toDate, string[] lstParams)
{
List<Dictionary<string, object>> dataResult = new List<Dictionary<string, object>>();
Dictionary<string, object> aSeries = new Dictionary<string, object>();
string currParam = string.Empty;
lstParams = (lstParams == null) ? new string[1] : lstParams;
foreach (DataRow dr in GetChartData(dataSource, locationType, locations, methods, fromDate, toDate, lstParams).Rows)
{
if (currParam != dr[1].ToString())
{
if (!String.IsNullOrEmpty(currParam)) //A new Standard Parameter is read and add to dataResult. Skips first record.
{
Dictionary<string, object> bSeries = new Dictionary<string, object>(aSeries); //Required else when clearing out aSeries, dataResult values are also cleared
dataResult.Add(bSeries);
aSeries.Clear();
}
currParam = dr[1].ToString();
aSeries["name"] = cParam;
aSeries["data"] = new List<ChartDataModel>();
aSeries["location"] = dr[0].ToString();
}
ChartDataModel lst = new ChartDataModel();
lst.Value = Convert.ToDateTime(dr[3]).ToShortDateString();
lst.Item = Convert.ToDouble(dr[2]);
lst.method = dr[4].ToString();
((List<ChartDataModel>)aSeries["data"]).Add(lst);
}
dataResult.Add(aSeries);
var result = Json(dataResult.ToList(), JsonRequestBehavior.AllowGet); //used to debug final dataResult before returning to AJAX call.
return result;
}
我意识到在C＃中有一种更有效和可接受的代码编写方式，但我继承了该项目。
答案 4 :(得分：1)
只是为了增添某种活力：
这是否为生成10个类别的堆积柱形图的数据 我希望每个类别4数据系列都有，并希望为每个数据系列显示其他信息（图像，问题，干扰器和预期答案）：
<?php
while($n<=10)
{
$data1[]=array(
"y"=>$nber1,
"img"=>$image1,
"ques"=>$ques,
"distractor"=>$distractor1,
"answer"=>$ans
);
$data2[]=array(
"y"=>$nber2,
"img"=>$image2,
"ques"=>$ques,
"distractor"=>$distractor2,
"answer"=>$ans
);
$data3[]=array(
"y"=>$nber3,
"img"=>$image3,
"ques"=>$ques,
"distractor"=>$distractor3,
"answer"=>$ans
);
$data4[]=array(
"y"=>$nber4,
"img"=>$image4,
"ques"=>$ques,
"distractor"=>$distractor4,
"answer"=>$ans
);
}
// Then convert the data into data series:
$mydata[]=array(
"name"=>"Distractor #1",
"data"=>$data1,
"stack"=>"Distractor #1"
);
$mydata[]=array(
"name"=>"Distractor #2",
"data"=>$data2,
"stack"=>"Distractor #2"
);
$mydata[]=array(
"name"=>"Distractor #3",
"data"=>$data3,
"stack"=>"Distractor #3"
);
$mydata[]=array(
"name"=>"Distractor #4",
"data"=>$data4,
"stack"=>"Distractor #4"
);
?>
在highcharts部分：
var mydata=<? echo json_encode($mydata)?>;
// Tooltip section
tooltip: {
useHTML: true,
formatter: function() {
return 'Question ID: <b>'+ this.x +'</b><br/>'+
'Question: <b>'+ this.point.ques +'</b><br/>'+
this.series.name+'<br> Total attempts: '+ this.y +'<br/>'+
"<img src=\"images/"+ this.point.img +"\" width=\"100px\" height=\"50px\"/><br>"+
'Distractor: <b>'+ this.point.distractor +'</b><br/>'+
'Expected answer: <b>'+ this.point.answer +'</b><br/>';
}
},
// Series section of the highcharts
series: mydata
// For the category section, just prepare an array of elements and assign to the category variable as the way I did it on series.
希望它有所帮助。